Table 5.

Effects of different sources and levels of selenium on total superoxide dismutase activity in serum and tissues of broiler breeders

Item	Se amount (mg/kg)	Serum (U/mL)	Liver (U/mg prot)	Kidney (U/mg prot)	Pancreas (U/mg prot)	Muscle (U/mg prot)
SS	0.15	156.8±8.0	192.2±20.0abc	110.8±10.8a	138.5±24.6	40.39±4.8
	0.30	156.8±7.8	189.7±21.4bc	105.7±14.8ab	154.0±37.9	38.85±4.1
SY	0.15	154.1±3.6	183.2±11.2bc	111.6±9.8a	170.0±21.8	38.11±4.0
	0.30	156.6±3.8	173.0±13.1c	97.7±11.8b	166.8±43.5	38.31±3.8
SM	0.15	160.3±8.8	210.5±14.4a	112.9±8.4a	173.7±85.0	41.57±3.8
	0.30	160.4±5.2	195.8±13.8ab	110.1±5.0a	131.9±15.6	41.56±5.1
SS		156.8±7.6	190.9±19.8ab	108.3±12.6	146.2±31.5	39.62±4.3
SY		155.3±3.8	178.1±12.8b	104.7±12.7	168.4±32.9	38.21±3.7
SM		160.3±7.0	203.2±15.5a	111.5±6.7	152.8±62.2	41.57±4.3
	0.15	157.1±7.3	195.3±18.8	111.8±9.1a	160.7±52.0	40.02±4.2
	0.30	157.9±5.9	186.2±18.4	104.5±11.9b	150.9±35.7	39.57±4.3
p value	Se source	0.096	0.003	0.292	0.465	0.173
	Se amount	0.658	0.099	0.047	0.511	0.756
	Se source×amount	0.830	0.644	0.403	0.289	0.862

^a–cMeans (n = 12) within a column lacking a common superscript differ (p<0.05).